MATLAB: My code taking too much time

MATLABoptimizationtimewhile loop

Here is my code. How can I reduce that time without changing the result?
clear all;clc;close all;
L=1000;
c = randn(1,1000000);
cont3 = 1;
while cont3 < length(c)+1
    if(abs(c(cont3)) < 1 || abs(c(cont3)) > 10)
        c(cont3) = randn(1);
        cont3 = 0;
    end
    cont3 = cont3+1;   
end
c;

Best Answer

You can operate on the entire vector using for example
a(a<1) = randn
So you could make a loop something like
while any(a<1) || any(a>10)
    a(a<1) = randn(sum(a<1),1)
    a(a>10) = randn(sum(a>10),1)
end
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